On 11/8/2011 6:56 AM, andy pugh wrote: > On 8 November 2011 11:16, James Louis<james.lo...@gastechnology.org> wrote: > >> Good morning all, >> There is an ad running in Digital Machinist magazine for an RC speed control >> of a brushless motor with ESC. If interested go to www.logicnc.com >> It gives EMC2 a way to control spindle speed from the parallel port. I >> haven't used one yet though. >> > It isn't strictly necessary. As the RC pulse protocol is a 1 - 2mS > pulse every 20mS the standard EMC2 PWM function can be used, but gives > fairly poor resolution. (20 discrete steps with a 25,000nS base > thread). > >
1-2 ms in 20ms ... I've read that before. So the min pulse width is 1 ms and the max is 2ms.. in a 20ms time slot? Seems like a waste to only use up to 2ms of the 20 ms time slot... Dave ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
